Display screen with a transitional graphical user interface



FIG. 1 is a first image in a first sequence of a display screen with a transitional graphical user interface, showing our new design;

FIG. 2 is a second image thereof; and,

FIG. 3 is a third image thereof.

A first example of an appearance of a transitioning user interface sequentially shifts between the images shown in FIGS. 1-3. The process or period in which one image transitions to another image forms no part of the claimed design.

The broken lines illustrating the environment of the design and the broken lines illustrating various portions of the graphical user interface form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a transitional graphical user interface, as shown and described. 